Model: FK19.5×47.5×1A-M8-4 Quantity: 4 filters in the pack (“-4” indicates a 4-pack) Nominal Size:19.5″ × 47.5″ × 1″ Actual Size:19.5″ × 47.5″ × ~0.75″ (true thickness inside the HVAC slot) MERV Rating:MERV 8 – good general filtration level for residential HVAC systems Filter Type: Pleated synthetic media in a rigid cardboard frame (standard disposable design) Made in USA: Yes